It depends on what you mean by winning. There's no pushback in the PR game from the prosecution. They're still conducting investigations and trials, with not much being released. Manafort is in jail and all of his DC District dismissal motions on evidence are being thrown out. His other pending trial in VA has been postponed, due to an illness in Tillis' family. The judge had received the unredacted papers he'd requested prior to the postponement and didn't make a ruling in the defense's favor. That's telling. In a separate investigation by SDNY, the Cohen case and its implications still looms. Plus, there's still the Daniels civil suit.
Twenty years ago, you couldn't find a bigger public villain than Ken Starr. That investigation went on for years. He was being assailed daily by the Clinton war room and a hostile MSM. He didn't care and kept investigating/prosecuting. Mueller's team is probably in the same mode - grind on, screw the polls. Even with all the bad PR, the Starr Report was eventually finished and released. Clinton was still impeached, held in contempt, fined, and marginalized for his remaining two years, despite the efforts of the Clinton machine and public opinion.
Re Starr, Trump has an advantage Clinton didn't have. Clinton perjured himself, whereas Trump did not collude with Russia [a 'statute,' which Rosenstein failed to specifically cite when appointing Mueller]. In the end Starr confirmed that Clinton committed perjury.
The theory at this point, fwiw, is that Mueller will scrape together some kind of obstruction charge. In my mind, Trump wins two ways on this. First, he denies the rabid press and Democrats the opportunity to hysterically claim a Saturday Night Massacre redux, simply by not emulating Nixon.
Second, the longer Mueller investigates the lower his credibility goes. His job, unlike Starr's, is to manufacture a crime. For that Mueller needs to be perceived as fair and nonpartisan. From that POV, he's failing more every month he drags the witch hunt out.
As I said originally, jmo.
